YouTube comment sections are weirdly positive always. It could be a video of some horrible crime and the comments will be about how great the channel is and encouraging the channel to keep making more videos. When j visit actual fan pages anywhere else online there are always a mix of opinions. But youtube is constantly full of obsequious people
If you remove the bots and people who are pay for comments, then you left with a society where everything is become to public domains, where every name have a face linked on a social network. People are scare to say fuck you and they want to give only a good impression.